my Tesla Model S won't start and just clicks what should I do

Tesla Model S Plaid/Refresh (2021-present)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

540 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix starting issues in Tesla Model S. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Ensure the vehicle is in 'Park' and the key is out of range before working on electrical components.
•Wear gloves and safety goggles when handling the battery.

Symptoms

•Clicking sound when the start button is pressed
•Dashboard lights flickering or dimming
•No response from the vehicle when attempting to start
•Potential warning messages on the touchscreen display
•Battery level may be low or fluctuating

Diagnostic Steps

1
Check the battery level on the touchscreen to confirm if it is sufficiently charged.
2
Inspect the 12V battery for voltage using a multimeter; it should read around 12.6V or higher.
3
Examine the connections of the 12V battery for corrosion or looseness.
4
Verify the status of the main battery pack through the Tesla app or service portal.
5
Attempt to reset the vehicle by holding down the brake pedal and pressing the start button for 10 seconds.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Multimeter
•Socket set
•Cleaning supplies (brush, baking soda, water for corrosion)

Parts Required

•Replacement 12V battery (if necessary)

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Diagnostic Steps

1
Check the battery level on the touchscreen to confirm if it is sufficiently charged.
2
Inspect the 12V battery for voltage using a multimeter; it should read around 12.6V or higher.
3
Examine the connections of the 12V battery for corrosion or looseness.
4
Verify the status of the main battery pack through the Tesla app or service portal.
5
Attempt to reset the vehicle by holding down the brake pedal and pressing the start button for 10 seconds.

Solution

1. Preparation

Ensure the vehicle is parked safely and the keys are out of the vehicle.
Gather necessary tools: multimeter, socket set, and cleaning supplies for terminals.

2. Inspect and Replace the 12V Battery (if necessary)

Access the 12V Battery Compartment
- Open the front trunk (frunk) to access the 12V battery.
Remove the Battery Cover
- Unclip and remove the plastic cover over the battery.
Disconnect the 12V Battery
- Using a socket wrench, disconnect the negative terminal first, followed by the positive terminal to avoid short circuits.
Inspect the Battery
- Check for signs of corrosion on terminals and ensure connections are tight.
Replace the Battery
- If the battery voltage is below 12.4V or shows signs of failure, replace the 12V battery with a compatible one (typically a Group 48 or similar).
- Install the new battery by connecting the positive terminal first and then the negative terminal.
Reattach the Battery Cover
- Secure the plastic cover back on the battery compartment.

3. Check and Reset Main Battery

Check Battery Management System
- Access the Tesla app to check for any alerts regarding the main battery.
Reset the System
- If no alerts, perform a soft reset by pressing and holding both scroll wheels on the steering wheel until the screen goes black, then release.